Warp stop motion



April 29, 1930. J. REGAN 1,756,607

WARP STOP MOTION Filed 0011.18, 1927 2.Sheets-Sheet 1 J/m EEG/7 WARP STOP MOTI ON Filed Oct. 18, 1927 2 Sheets-Sheet, 2

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JOHN REGAN, OF NEW BEDFORD, MASSACHUSETTS,

KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORP'ORATION O1 MASSACHUSETTS ASSIG-NOR TO CROMPTON 80 WAR]? STOP MOTION Application filed. October 18, 1927. Serial No. 226,976.

This invention relates to improvements in warp stop motions particularly though not necessarily for looms and it is the general ob ject of the invention to provide means whereby the motion can be moved relatively to the actuator therefor without requiring extensive changes in the connections between the actuator and the moving part which drives the same.

It frequently happens that two different kinds of fabric will be woven on the same loom, at difierent times, one fabric making it desirable to have the warp stop motion as near the whip roll as possible while the other fabric will be such that the warp stop motion should be nearer the front of the loom. In

the form of warp stop motion set forth in my prior Reissue Patent No. 14,829 and also in the driving mechanism therefor as disclosed in patent to Holmes No. 1,360,638 there are provided a. number of noncircular detector rods which pass through slots in drop wires. The

upper ends of the slots are restricted so that a fallen drop wire will engage opposite sides of the corresponding detector rod to prevent oscillation thereof and thereby stop the loom.

In my co-pending application Ser. No. 210,661

I have shown an electrical warp stop motion wherein a fallen drop wire of the form shown in the aforesaid patents will be moved positively by the oscillating detector rod into engagement with a contact bar. In both the mechanical and the electrical motions it is necessary to impart a rocking movement to the noncircular rods and this has been accomplished heretofore by means of a rocking lever actuated by an upright rod the lower end of which is connected directly to a cam lever. When such a construction is employed it is occasionally found inconvenient to move the warp stop motion from one position to another and it is an important object of my present invention to provide means whereby the upright rod which actuates the noncircular detector members shall be moved by a cam lever but shall not be directly connected thereto.

It is a further object of my invention to provide a driving lever with an inclined surface which will engage the lower end of the vertically reciprocating actuator rod, the inclined surfacecompensating forthe different positions of the warp stop motion so that the oscillating detector rods will be given substantially the same movement irrespective of the location of the warp stop motion.

lVith these and other objects in viewwhich will appear as the description proceeds, myinvention resides in the combination and arrangement of parts hereinafter described and set forth in the claims. 1

In the accompanying drawings wherein I have illustrated my invention as applied both to a mechanical and electrical warp'stop mo-- tion, and wherein two forms of my invention are shown, e n Fig. 1 is a side elevationof a loomequipped with a mechanical motion and having the preferred form of my "invention applied thereto, parts being removed for the sake ofclearness, Fig. 2 is an enlarged side elevation of one end of the warp stop motion shown in Fig. 1, Fig. 3 is an enlarged top plan view taken in the direction of arrow 3,Fig. 1, v

Fig. & is an enlarged vertical section on line I 4-4 of Fig. 1,

Fig. 5 is a view similar to a portion of Fig, l but showing a loom equipped with an electrical warp stop motion and having the modified form of my invention applied thereto,

Fig. 6 is an enlarged side elevation of that.

end of the electrical motion seen in Fig. 5,

Fig. 7 is a transverse section through the electrical warp stop motion showing thedrop wires in normal position, and r r Fig. 8 is an enlarged detailed vertical tion on line 88 of Fig. 5.

Referring particularly to form shown in Figs. 1 and 4: it will be seen that I'have provided a loom 10 having a warp beam 11 and whip roll 12. A bottom shaft 13 has secured thereto a cam 14- which makes a complete revolution in two picks of V the mechanical on the loom frame and holds a head 18 which is secured in adjusted position along the horizontal leg of the rod 17. In the upper portion of the head is a laterally and horizontally extending stud 19 on which is'pivoted a rock lever 20. Said lever is provided with a hook 21 and forkedarm 22 through which extends a stud 23. Arod 24 extends through the stud 23 and has the lower end thereof operatively connected to hell crank lever 25,

said rod 24 supporting a. compression spring 26 which lies between stud 23 and a collar 27 adjustab-ly secured to said rod 24. V

A number of rocking'arms 28 are connected together by a link 29 which is connected to bell cranklever -so that as the latter rocks back andforth an oscillating angular movement will be given to the arms 28. One. of

said armsc-arries a pin 30 which lies under the left end of a dog 31, the right hand end 32 of which is designed for engagement with the hook 21." Said dog is pivoted to a normally stationary lever 33 which has connection with knock-off rod34. An actuator rod 35 is connected to the rocking lever 20 and reciprocates the latter during therunningof the loom to cause the hook 21 to move toward and from the dog. s

' The bell crank lever25 and'the arms 28 are each operatively connected to a noncircular detector rod 36 which extends through drop Wires "W one of which is shown in Fig. 2. The detector rods rocking back and forth under normal'conditions by a force derived from the actuator rod 35 and imparted to them through the spring 26. When one of the detector rods 36'is heldagainst oscillation the spring 26is compressed: and the end 32 of dog'31 is heldin the path of hook 21 so that as the latter moves to the left the lever 33 and knock-off rod 34 will be moved to the left also to effect stoppage of the loom. The

" rod 34 may havean adjustable linlr37 (see Fig. 3) by -means of which the length of said rod may be varied when the location of the warp stop motion is changed. The mat ter thus far described, with the exception of theform' of rods 34 and 35', is substantially the same as shown in the aforesaid patents. In the construction shown in Figsf5 to 8 inclusive provide a stand 50 having guides 51 which direct a vertically moving plate 52. Said platehas an offset'ear '53through whichextends the upper threaded end of an actuator rod 54. Said rod is held in posi 'tion by lock nuts 55 so said plate 52 "maybe adjusted with respect to rod' 54:. Said plate'isfprov'ided with a pair of inclined slots 56 each of which'receives a stud 57 extending laterally from a rocking arm 53f 'Each arm 58 is operatively connected to a non-circular detector rod 59 so that as the plate moves up and down said arms 58 will rock first in one direction and then in the'other to oscillate the detector 'rods' Said rods are rotatably mounted in the frame 50 and cooperate with drop wires of the same form as those shown in connection with the mechanical motion.

Secured to but insulated from the frame 50 are a pair of contact plates 60 which maybe normally out of vertical alignment with the matter described in Figs. 5 to 8 inclusiveis 7 substantially the same as that set forth n my aforesaid application.

In the forms of invention heretofore described it is necessary to impart vertical move ment to the actuator rods 35 and 54, respectively. may be the same although I have shown two The means for accomplishing this.

forms herein. In the preferred form shown" in 1 a cam lever 70 pivoted at 71 to the loom frame has a roll 72 which 1s held constantly in contact with the cam 14 by gravity and if desired additionally by a tension spring 73. The lower end of the rod 35 is threaded to receive a head 74, the lower end of which has a broad flange .75 carrying a hardened 1 plate 77 The flange 7 5 is so proportioned as to have mechanical contact with the inclined surface 76 of the cam lever 70.

Asthe cam 14 raises and lowers the cam M lever, the rod 35 will be given corresponding movements although there is no direct contact between the rod and its cam lever such as would prevent quick adjustment of a warp stop motion. 7 V

V In the modified form used with the electrical stop motion the parts for driving the rod 54L are similar to those described inconnection with Fig. l, but the cam lever 80 is provided with'a broad uppersurface 81 and the lower end of rod 54 not providedwith a head (see Fig. 8) such as is the case with rod 35. Rela- 1 tive adjustment between the rod and the cam lever v89 may be attained byvmeans of the nuts 55and'theear 53I In'bothforms of the cam levers7O and 8O the upper surface which has periodic engage ment'with the vertical actuator rods are in-' clined so that irrespectiveof the position of the warp stop motions said rods ,will be given the same amount of vertical movement.

This result is accomplished by,inclining the; upper surface of the camlevers downward ly and toward the cam. 1' p V From the foregoingltwill-be seenthat I have provided a'very simple means for imparting-movement both to electrical and'm'e-j ehanical warp stop motions from a regularly moving cam lever and by mechanism which is not directly connected to said cam lever. By reason of this construction it is possible to'move the warp stop motion relatively to the driving devices therefor, and it will further be seen that the cam levers are so formed that they impart substantially the same movement to the actuator rods irrespective of the location of the warp stop motion.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art JltllOlli? departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is p 1. In a loom, a warp stop motion having an oscillating rod and a mounting for the rod which is adjustable relatively to the loom, a vibrating lever, and a reciprocating member normally disconnected from the lever and said lever having a surface substantially perpendicular to the reciprocating member and having operative contact with the lever at certain times only in the cycle of the pick and operatively connected to said rod to oscillate the latter, said member and lever being capable of having operative driving contact with each other at any one of a continuous series of points along the lever.

52. In loom. a warp stop motion having an oscillating rod and a mounting for the rod which is adjustable relatively to the loom, a periodically vibrating lever, and a member operatively connected to the oscillating rod and normally disconnected from the lever and said lever having a surface substantially perpendicular to the reciprocating member and having operative contact with the latter during a portion of the cycle of the pick of the loom to be moved by saidlever to oscillate the rod, said member and lever being capable of having operative driving contact with each other at any one of a continuous series of points along the lever.

3. In a loom, a warp stop motion having an oscillating rod and a mounting for the rod which is adjustable relatively to the loom, a constantly moving cam, a cam lever to be vibrated by the cam, and a reciprocable member operatively connected to the rod to cause oscillation of the latter when said member is reciprocated, said member being normally disconnected from the lever and said lever having a surface substantially perpendicular to the reciprocating member and being operatively related thereto during a portion of the revolution of the cam whereby said member is reciprocated to oscillate the rod, said member and lever being capable of having operative driving contact with each other at any one of a continuous series of points along the lever.

4. In a loom, a warp stop motion having a rod to be oscillated, a reciprocating member operatively connected to the rod to cause 0scillation of the same, an actuating member normally disconnected from the first named member, means to periodically cause operative engagement between said members to cause oscillation of the rod, and means to render said members relatively adjustable, saic members being capable of having operative driving contact with each other at any one of a continuous series of points along the lever.

5. In a loom, a warp stop motion having an oscillating rod and a mounting for the rod which is adjustable relatively to the loom, a member to be reciprocated and operatively connected to the rod to cause oscillation thereof, and a vibrating lever for said member having a continuous inclined surface to contact with said member during a portion only of the cycle of the pick of the loom, said inclined portion effective to give said member the same amount of movement irrespective ofthe adj usted position of said warp stop motion with respect to the loom.

6. In a loom, a warp stop motion, a non-circular rod to be oscillated and forming part of the warp stop motion, an operating member operatively connected to the rod, a cam lever pivoted to the loom frame," a cam to actuate said lever, said member and lever being normally disconnected, and said lever having a surface which is inclined downwardly and away from the pivot of the lever to be operatively related to the member during a portion of the revolution of the cam, said inclined portion being effective to give the member equal movements in a vertical direction to oscillate the rod to the same extent for all adjusted positions of the warp stop motion relatively to the loom.

In testimony whereof I have hereunto af fixed my signature.

JOHN REGAN. 

